# All in One Formula vs Engineering Formulas

The clearest difference is update cadence: Engineering Formulas at every 2 months against All in One Formula's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. All in One Formula sells 1 one-off in-app purchase and Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

All in One Formula ships an update every 6 months, Engineering Formulas every 2 months. The most recent releases landed on October 30, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | All in One Formula | Engineering Formulas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 90 MB | 45 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Raj Dev Barman](https://appshunter.io/developer/1832913213) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### All in One Formula

[App page](https://appshunter.io/ios/app/all-in-one-formula-math-ai/id6749927877)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All-in-One Formula Pro | $24.99 | one-time |


### Engineering Formulas

[App page](https://appshunter.io/ios/app/engineering-formulas-engiref/id6758258119)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Yearly Premium | $29.99 | per year |
| Lifetime Access | $54.99 | one-time |


## Frequently asked questions

### Is All in One Formula free?

All in One Formula is free to download, with in-app purchases available.

### Is Engineering Formulas free?

Engineering Formulas is free to download, with in-app purchases available.

### Do All in One Formula or Engineering Formulas have ads?

Neither All in One Formula nor Engineering Formulas shows ads.

### Which is updated more often, All in One Formula or Engineering Formulas?

All in One Formula ships an update every 6 months, and Engineering Formulas every 2 months. Most recently, All in One Formula was updated on October 30, 2026 and Engineering Formulas on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*